December in Rowlett averages a daily high of 14.5°C with nights around 1.7°C. Expect roughly 7 wet days totalling 79.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Rowlett is March–April.
Based on LAVON DAM, TX US (16.4km), 1995–2024. 16 years of December data.